The 2013 M is a 4-door, 5-passenger SL, available in 5 trims, ranging from the 37 to the 56x.

Upon introduction, the 37 is equipped with a standard 3.7-liter, V6, 330-horsepower engine that achieves 18-mpg in the city and 26-mpg on the highway. The 56x is equipped with a standard 5.6-liter,
V8, 420-horsepower engine that achieves 16-mpg in the city and 23-mpg on the highway. A 7-speed a transmission with overdrive is standard on both trims. See more...See Less